Festo MPA-ASI Series, Руководство пользователя

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3. Installation
3−19
Festo P.BE−MPA−EN en 0802c
3.4.5 Vacuum / low pressure operation
Note
The 2x2/2−way valves with Ident. code D, I and the
2x3/2−way valves with Ident. code N, K, H are not suitable
for vacuum or low pressure operation if they are supplied
via connection 1.
·
Operate these valves in a separate pressure zone.
·
The operating pressure for this pressure zone must be
set in accordance with the diagram in Fig.A/1.
If valves are used for switching vacuum, filters must be
used in the suction line in order to avoid functional
damage due to dirt.
The following conditions must be fulfilled before you can
operate your MPA−S valve terminal at supply connection 1
with vacuum or low pressure between −0.9
Ū
3 bar:
The pilot control of the valve solenoid coils is operated
with external closed−loop regulated pilot air.
The valve terminal is fitted with the following valve plates
and, in some cases has further pressure zones.
Valve plates
Pressure zone with
vacuum or
low−pressure supply
via connection 1
1)
The pressure zone must be fitted only with the following valve plates:
5/2−way valve, single−solenoid (Ident. code M)
5/2−way valve, double−solenoid (Ident. code J)
5/3−way valves (Ident. codes B, E and G)
3/2−way valve (Ident. code W and X) see
2)
and the following note
Pressure zone with
over pressure supply
3)
via connection 1
The pressure zone can also be fitted with the following valve plates:
2x3/2−way valves (Ident. code H, K and N)
2x2/2−way valves (Ident. code D and I), see also the following note
1)
The valve plates with Ident. code D, H, K, N and I are not suitable for vacuum or low−pressure
operation if they are supplied via connection 1
2)
in accordance with diagrams in appendix A, Fig.A/2
3)
in accordance with diagrams in appendix A, Fig.A/1
Tab.3/2: Valve plates